#ThanksDave: Jennifer Lawrence, Seth Rogen and more send off Letterman

David Letterman appears during the final taping of "Late Show with David Letterman" on Wednesday in New York. (John Paul Filo / CBS)

As David Letterman bade farewell to late-night on Wednesday, celebrities poured their hearts and humor out on social media to send off the "Late Show" host after 33 years in the biz.

Musicians shared their performances, comedians shared their stand-up bits and nearly all of them thanked Letterman for his imprint on television. Even late-night hosts Conan O'Brien and Jimmy Kimmel paid tribute to the veteran during their monologues.

Here's a look at what his fellow comedians, fans and colleagues had to say.

"Veep" star Julia Louis-Dreyfus, who helped deliver the star-studded Top Ten list, called the evening "extraordinary."

Well, that was extraordinary. #thanksdave Late Show with David Letterman #letterman

Actor-comedian Patton Oswalt wrote a touching tribute to the host on Facebook and shared his set list from his sole appearance as a stand-up comedian on "The Late Show."

"So thanks, Dave. I only got to meet you once, when we shook hands after my first and only stand-up set on your show (that's a pic of my setlist, written in my hotel room that afternoon of the taping). You were friendly but distant, but I could tell you wanted me to do well. One comedian to another. And thank you for NEVER putting yourself above the oddness you so clearly delighted in."

David Letterman's last show is Wednesday night. I'm writing this now because I know I'll lose it after watching him talk...